.img_box {
  margin-left: 26%;
}
.nav {
  position: fixed;
  bottom: 50px;
  left: 500px;
  z-index: 999;
}
.nav .back {
  position: relative;
  width: 45px;
  height: 45px;
  padding: 0;
  left: -80px;
  top: 40px;
}
.nav .nextZj {
  position: relative;
  top: -50px;
  left: 180px;
  float: right;
  line-height: 45px;
  font-size: 15px;
}
.nav .nextZj button {
  margin-left: 15px;
}
.popupClass {
  height: 450px;
  padding: 5px;
}
.list_box {
  padding: 10px 4px;
  box-sizing: border-box;
}
.span {
  display: inline-block;
  width: 100%;
  padding: 5px 2px;
  box-sizing: border-box;
  text-align: center;
  line-height: 30px;
  font-size: 15px;
  color: #323233;
  background-color: #fff;
  border: 1px solid #ebedf0;
  border-radius: 5px;
}
